The following layout test is flaky on MacOS and iOS http/wpt/resource-timing/rt-revalidate-requests.html Probable cause: Test is a flakey failure already marked as flakey from webkit.org/b/171511. Recently it has become a flakey Timeout, we should be able to regress this. Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Fwpt%2Fresource-timing%2Frt-revalidate-requests.html
looks like this issue came from https://trac.webkit.org/changeset/237735/webkit
(In reply to Truitt Savell from comment #1) > looks like this issue came from > https://trac.webkit.org/changeset/237735/webkit I do not think this is possible. I have verified and this test does not process swap so r237735 is a no-op in the context of this test and cannot even impact the timing. However, from running http/wpt/resource-timing/rt-revalidate-requests.html, I can say that it is very slow, which may be why it is timing out on bots.
<rdar://problem/45818891>
Looking at the test history it doesn't look like failures / timeouts are any more common recently (at least in however far back the flakiness dashboard goes). I can probably split this test up into a few tests and see if that helps.
Created attachment 357173 [details] [PATCH] Proposed Fix
*** Bug 171511 has been marked as a duplicate of this bug. ***
Attachment 357173 [details] did not pass style-queue: ERROR: LayoutTests/ChangeLog:15: Need whitespace between colon and description [changelog/filechangedescriptionwhitespace] [5] Total errors found: 1 in 8 files If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 357173 [details] [PATCH] Proposed Fix rs=me Maybe we should have better names than "rt-revalidate-requests-1.html", like "rt-revalidate-requests-sameorigin.html"...
Comment on attachment 357173 [details] [PATCH] Proposed Fix Clearing flags on attachment: 357173 Committed r239138: <https://trac.webkit.org/changeset/239138>
All reviewed patches have been landed. Closing bug.